ACT Systems (Advanced Computer Technology) (San Diego, Calif.)

Founded in late 1979, ACT Systems built what it called supermicro computers. It’s Turbo-Micro was a multi-user system based on a Z80 CPU and the S-100 bus. By 1984, the system was upgraded to include an Intel 80186 alongside the Z80, but by then the days of the S-100 systems were numbered.